LexAlias(3pm) User Contributed Perl Documentation LexAlias(3pm)
NAME
Devel::LexAlias - alias lexical variables
SYNOPSIS
use Devel::LexAlias qw(lexalias);
sub steal_my_x {
my $foo = 1;
lexalias(1, '$x', \$foo);
}
sub foo {
my $x = 22;
print $x; # prints 22
steal_my_x;
print $x; # prints 1
}
DESCRIPTION
Devel::LexAlias provides the ability to alias a lexical variable in a
subroutines scope to one of your choosing.
If you don't know why you'd want to do this, I'd suggest that you skip
this module. If you think you have a use for it, I'd insist on it.
Still here?
lexalias( $where, $name, $variable )
$where refers to the subroutine in which to alias the lexical, it
can be a coderef or a call level such that you'd give to "caller"
$name is the name of the lexical within that subroutine
$variable is a reference to the variable to install at that
location
BUGS
lexalias delves into the internals of the interpreter to perform its
actions and is so very sensitive to bad data, which will likely result
in flaming death, or a core dump. Consider this a warning.
There is no checking that you are attaching a suitable variable back
into the pad as implied by the name of the variable, so it is possible
to do the following:
lexalias( $sub, '$foo', [qw(an array)] );
The behaviour of this is untested, I imagine badness is very close on
the horizon though.
SEE ALSO
peek_sub from PadWalker, Devel::Peek
AUTHOR
Richard Clamp <richardc@unixbeard.net> with close reference to
PadWalker by Robin Houston
COPYRIGHT
Copyright (c) 2002, 2013, Richard Clamp. All Rights Reserved. This
module is free software. It may be used, redistributed and/or modified
under the same terms as Perl itself.
perl v5.36.0 2022-10-20 LexAlias(3pm)
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